1201273001 has 2 divisors, whose sum is σ = 1201273002. Its totient is φ = 1201273000.

The previous prime is 1201272991. The next prime is 1201273019. The reversal of 1201273001 is 1003721021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757075225 + 444197776 = 27515^2 + 21076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201273001 - 2⁶ = 1201272937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201273201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600636500 + 600636501.

It is an arithmetic number, because the mean of its divisors is an integer number (600636501).

Almost surely, 2^1201273001 is an apocalyptic number.

It is an amenable number.

1201273001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201273001 is an equidigital number, since it uses as much as digits as its factorization.

1201273001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 1201273001 is about 34659.3854677200. The cubic root of 1201273001 is about 1063.0342045575.

Adding to 1201273001 its reverse (1003721021), we get a palindrome (2204994022).

The spelling of 1201273001 in words is "one billion, two hundred one million, two hundred seventy-three thousand, one".